$119 Cheap Delta flights from Philadelphia to St. Louis (PHL to STL)

Find The Best Day To Fly from Philadelphia to St. Louis

Amazing Delta PHL to STL Flight Deals

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were $192 round trip and $119 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Sep 23 - Thu, Sep 25
PHL
Philadelphia
STL
St. Louis
$192 Roundtrip, found 1 day ago
$192
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Sep 23 from Philadelphia to St. Louis, returning Thu, Sep 25, priced at $192 found 1 day ago
Wed, Sep 24 - Sat, Sep 27
PHL
Philadelphia
STL
St. Louis
$237 Roundtrip, found 4 hours ago
$237
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, Sep 24 from Philadelphia to St. Louis, returning Sat, Sep 27, priced at $237 found 4 hours ago

STL From PHL Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
The Wildwood Hotel

The Wildwood Hotel

3.5 out of 5
Save 100% on your flight
per person
Aug 11 - Aug 18
found 20 hours ago
Roundtrip non-stop flight included
Philadelphia (PHL) to St. Louis (STL)
Ameristar Casino Resort and Spa

Ameristar Casino Resort and Spa

4.5 out of 5
Save 100% on your flight
per person
Aug 11 - Aug 18
found 20 hours ago
Roundtrip non-stop flight included
Philadelphia (PHL) to St. Louis (STL)
Hampton Inn By Hilton St Louis Airport

Hampton Inn By Hilton St Louis Airport

2.5 out of 5
Save 100% on your flight
per person
Aug 11 - Aug 18
found 20 hours ago
Roundtrip non-stop flight included
Philadelphia (PHL) to St. Louis (STL)
Don't see what you're looking for?
See all available trips from Philadelphia Intl. to Lambert-St. Louis Intl.
View all trips

Frequently asked questions

Can I catch a flight from PHL to Lambert-St. Louis Intl. Airport (STL) right now?
For info on any present Lambert Field quarantine requirements and travel advice, visit the Covid-19 Travel Advisor. Check before you arrange your flight, so you don't get caught out en route.
What terminal is Delta Air Lines at PHL?
Before you jet off from Philadelphia Intl. Airport (PHL) to St. Louis Lambert International Airport with Delta Air Lines, it's probably a good idea to get in touch with the airline to find out your terminal information. While your ticket should hold some of the details, we can't guarantee it.
Are there Delta Air Lines non-stop flights from PHL to STL?
Expect a stopover when jetting from Philadelphia Intl. Airport (PHL) to STL, as Delta Air Lines doesn't offer nonstop flights between these two locations. While in transit, you might like to purchase the local newspaper or your favorite magazine from the airport bookstore to make the time go quicker.
How long is a Delta Air Lines flight from PHL to STL?
From the minute your Delta Air Lines aircraft gets pushed back from the gate at Philadelphia Intl. Airport (PHL) to the instant it taxis into Lambert-St. Louis Intl. Airport (STL), you'll be in your seat for roughly 3 hours and 58 minutes. With such a quick flight time, it's an ideal spur-of-the-moment escape.
How many direct and indirect flights does Delta Air Lines fly from PHL to STL?
You'll enjoy lots of options if you'd prefer to fly with Delta Air Lines from PHL to STL. It's currently operating around 6 flights every day.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Lambert-St. Louis Intl. Airport (STL), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.
Delta Airports
Hop on a(n) Delta flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ATLUSAHartsfield-Jackson Atlanta Intl.252
DTWUSADetroit Metropolitan Wayne County156
MSPUSAMinneapolis - St. Paul Intl.131
SLCUSASalt Lake City Intl.116
SEAUSASeattle - Tacoma Intl.57
LAXUSALos Angeles Intl.41
AMSNLDSchiphol31
YYCCANCalgary Intl.26
YYZCANPearson Intl.24
JFKUSAJohn F. Kennedy Intl.23

Travelers ❤️ these 🏨 after their flight to St. Louis

Pear Tree Inn St. Louis Airport

Pear Tree Inn St. Louis Airport

2.5 out of 5
10810 Pear Tree Ln, St. Ann, MO
This hotel features a gym and a seasonal outdoor pool. Traveling on business? Take advantage of the business center, free WiFi in public areas, and free airport ...
9.2/10 Wonderful! (2,616 reviews)
"Perfect pre flight overnight"

Reviewed on Jul 14, 2025

Pear Tree Inn St. Louis Airport
Wingate by Wyndham St. Louis Airport

Wingate by Wyndham St. Louis Airport

2.5 out of 5
10820 Pear Tree Lane, St. Ann, MO
This hotel features an outdoor pool and a 24-hour gym. Traveling on business? Take advantage of the business center, free WiFi in public areas, and free airport ...
9.2/10 Wonderful! (1,333 reviews)
"The whole process was smooth checking in and out. the staff were all great. Bedroom was clean"

Reviewed on Jul 15, 2025

Wingate by Wyndham St. Louis Airport
DoubleTree by Hilton St. Louis Airport

DoubleTree by Hilton St. Louis Airport

4 out of 5
4505 Woodson Road, St. Louis, MO
This hotel features an outdoor pool, a 24-hour gym, and a restaurant. Bring the family and enjoy the arcade/game room and kid-friendly dining. Unwind with a ...
7.8/10 Good! (768 reviews)
"Clean and the staff was wonderful"

Reviewed on Jul 10, 2025

DoubleTree by Hilton St. Louis Airport
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.